Banco Central de São Tomé e Príncipe Exchange Rates Today & Official API

Official Banco Central de São Tomé e Príncipe rates for 25 Sept 2026: 1 USD = 21.554 STN, 1 GBP = 28.493 STN (1 EUR fixed at 24.5 STN). All 14 currencies published, CSV/Excel download. Free JSON API for tax, audits, and compliant invoicing.

Banco Central de São Tomé e Príncipe official daily exchange rates as JSON: 14 currencies against the STN. Latest table on every plan. Get your API key.

About Banco Central de São Tomé e Príncipe

Banco Central de São Tomé e Príncipe publishes a daily exchange bulletin for the dobra (STN): buying, selling and mid rates for 14 currencies and the SDR. The dobra has been pegged to the euro at 24.5 since 2010, so the euro line is fixed and the dollar, pound, yen, CFA franc, real and the rest move with the euro's crosses. The bulletin is the official rate for customs and tax purposes in São Tomé; the bank publishes the table in force only, so our archive builds forward from September 2026.

• Official website: www.bcstp.st
• Official rate publication: Boletim de Câmbio

Quick start

One request for the pair you need — USD to STN at the official Banco Central de São Tomé e Príncipe rate:

curl "https://allratestoday.com/api/v1/central-bank/bcstp/latest?source=USD&target=STN" \
  -H "Authorization: Bearer art_live_your_key"

Or the bank's full published table:

curl "https://allratestoday.com/api/v1/central-bank/bcstp/latest" \
  -H "Authorization: Bearer art_live_your_key"

On paid plans, any historical date or a time series:

curl "https://allratestoday.com/api/v1/central-bank/bcstp/history?source=USD&target=STN&from=2025-01-01" \
  -H "Authorization: Bearer art_live_your_key"

Latest published rates (2026-09-25)

Below is the current table from Banco Central de São Tomé e Príncipe, unmodified — what a call to /latest returns right now, with values STN per 1 unit of each currency:

Download this table: Excel (.xlsx) CSV (paid plan required)

Base	Quote	Type	Rate
BRL	STN	buy	4.1603
BRL	STN	middle	4.1915
BRL	STN	sell	4.2227
CAD	STN	buy	15.2677
CAD	STN	middle	15.3822
CAD	STN	sell	15.4967
CHF	STN	buy	26.0389
CHF	STN	middle	26.2342
CHF	STN	sell	26.4295
CNY	STN	buy	3.2109
CNY	STN	middle	3.235
CNY	STN	sell	3.2591
DKK	STN	buy	3.2773
DKK	STN	middle	3.3019
DKK	STN	sell	3.3265
EUR	STN	buy	24.5
EUR	STN	middle	24.5
EUR	STN	sell	24.5
GBP	STN	buy	28.493
GBP	STN	middle	28.7067
GBP	STN	sell	28.9204
JPY	STN	buy	0.1357
JPY	STN	middle	0.1367
JPY	STN	sell	0.1377
NOK	STN	buy	2.2707
NOK	STN	middle	2.2878
NOK	STN	sell	2.3048
SEK	STN	buy	2.175
SEK	STN	middle	2.1913
SEK	STN	sell	2.2076
USD	STN	buy	21.5536
USD	STN	middle	21.7153
USD	STN	sell	21.8769
XAF	STN	buy	0.0374
XAF	STN	middle	0.0376
XAF	STN	sell	0.0379
XDR	STN	buy	29.2847
XDR	STN	middle	29.2847
XDR	STN	sell	29.2847
ZAR	STN	buy	1.3113
ZAR	STN	middle	1.3211
ZAR	STN	sell	1.331

Node.js / TypeScript client

A dedicated zero-dependency npm package wraps these endpoints — bcstp-exchange-rate:

npm install bcstp-exchange-rate

import { getRate } from 'bcstp-exchange-rate';

const pair = await getRate('USD', 'STN', { apiKey: 'art_live_...' });
console.log(pair.rate, pair.rate_date);

Zero dependencies, TypeScript types included, and it runs anywhere fetch exists — Node 18+, Bun, Deno, and edge runtimes.

Full reference — installation, all four functions, response shapes, error codes: bcstp-exchange-rate documentation.

Why use the official Banco Central de São Tomé e Príncipe rate?

When an auditor or tax office in São Tomé and Príncipe asks which rate you used, "the STN mid-market rate at 14:32" is not an answer — the official rate published by Banco Central de São Tomé e Príncipe for that date is. This API returns exactly those published figures, stamped with the bank's own rate_date; on weekends and holidays the most recent published table is returned, as compliance rules expect.

Pairs the bank doesn't print directly are resolved from its table (inverse or cross via STN) and explicitly flagged "derived": true — so what the bank printed and what was computed are never confused.

Endpoints

• GET /api/v1/central-bank/bcstp/latest — latest table or single pair (all plans)
• GET /api/v1/central-bank/bcstp/{YYYY-MM-DD} — the table for any date (paid plans)
• GET /api/v1/central-bank/bcstp/history — time series, up to 5,000 rows (paid plans)
• GET /api/v1/central-bank/bcstp/availability — publication calendar: the dates the bank actually published (all plans)

Full parameter reference in the API documentation. Every request counts toward your plan's monthly quota — rates change once per business day, so caching a published table locally makes a small quota go far.

Frequently asked questions

Is there an API for Banco Central de São Tomé e Príncipe exchange rates?

Yes — this one. Official daily STN rates as clean JSON, latest table on every plan including free.

How often does Banco Central de São Tomé e Príncipe update its rates?

New tables land once per business day — the API picks each one up shortly after Banco Central de São Tomé e Príncipe publishes it (latest: 2026-09-25).

Is this the official published table?

Yes — the rows are Banco Central de São Tomé e Príncipe's published figures, untouched, with the original publication date attached. Pairs the bank didn't print are computed and flagged derived.

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